Have students watch the following 2 videos at home for instructions on how to prepare a standard solution as well as how to dilute a solution the night before preparing solutions in class
This activity has students prepare 100 mL of a 0.500 M solution of NaCl (if your lab is in need of solutions that don't have to be extremely quantitative - not for titrations - you may want to assign different groups of students to prepare different solutions).
The second part of this activity has students peform a serial dilution using their prepared solution (after adding food colouring to it) to practice their dilution skills.
See handout above for 3 questions where students must use the dilution formula to solve the problem (C1V1 = C2V2). This can be done in the lab groups that the students completed the activity in.
Curriculum Expectations: 2.1 Use appropriate terminology related to aqueous solutions and solubility 2.2 Solve problems related to the concentration of solutions by performing calculations involving moles, and express the results in various units 2.3 Prepare solutions of a given concentration by dissolving a solid solute in a solvent or by diluting a concentrated solution
Have students watch the following 2 videos at home for instructions on how to prepare a standard solution as well as how to dilute a solution the night before preparing solutions in class
Video #1: Preparing a Standard Solution: https://www.youtube.com/watch?v=cckAwavEKA0
Video #2: Diluting a Solution: https://www.youtube.com/watch?v=MG86IFZi_XM
Please see the following handout, for a written description that students can print off and keep in their chemistry notes (and during the activity).
Handout: Preparing Solutions
Activity: Making a Standard Solution & Diluting a Solution
Activity Making Solutions
This activity has students prepare 100 mL of a 0.500 M solution of NaCl (if your lab is in need of solutions that don't have to be extremely quantitative - not for titrations - you may want to assign different groups of students to prepare different solutions).
The second part of this activity has students peform a serial dilution using their prepared solution (after adding food colouring to it) to practice their dilution skills.
Practice Questions
See handout above for 3 questions where students must use the dilution formula to solve the problem (C1V1 = C2V2). This can be done in the lab groups that the students completed the activity in.
Curriculum Expectations:
2.1 Use appropriate terminology related to aqueous solutions and solubility
2.2 Solve problems related to the concentration of solutions by performing calculations involving moles, and express the results in various units
2.3 Prepare solutions of a given concentration by dissolving a solid solute in a solvent or by diluting a concentrated solution